水-沙两相流的激光多普勒分相测量和试验研究  

LDV measurments and experimental study of water and sediment two phase flow

作　　者：刘青泉[1] 

机构地区：[1]中国科学院力学研究所

出　　处：《泥沙研究》1998年第2期72-80,共9页Journal of Sediment Research

摘　　要：探讨泥沙颗粒在水流中的悬浮运动机理和水、沙两相之间的相互作用，首先需要分别了解水流和泥沙颗粒的运动特性及相互关系。因此，怎样分相观测水流和泥沙颗粒的运动参数成为泥沙运动基本理论研究的一个重要问题。本文集中介绍了利用激光多普勒技术分相测量水流和泥沙运动参数的基本原理和方法，以及利用常见的一维激光器（无声光频移）测量水流和颗粒垂向（垂直于水流运动方向）脉动速度的实验方法。使用该技术对水平方管内的水－沙两相流运动进行了试验观测，给出了两相速度、纵向及垂向湍流度，以及泥沙浓度的测量结果。For investigating the interaction between water and sediment, firstly, we must know clearly the motion characteristics of both the water and sediment phases, which makes it very important how to measure the motion parameters of both the water and sediment in the two phase flow. LDV technique has been considered to be suited to the two phase flow measurements. In this paper, we present both the basic principle of measuring motion parameters of both phases by use of a laser doppler anemometry, and the experimental method of measuring intensity of vertical fluctuating velocity by use of a popular one dimensional LDV. Appling this method, LDV measurements of both phase movements were made in a horizontal pipe water sediment flow. The measurements results of velocity and intensity of fluctuating velocity of both phases, and sediment concentrations are showed in the paper.

关 键 词：水流运动 泥沙运动 泥沙颗粒 泥沙浓度 量水 浮运 两相流 脉动速度 一维 分相 

分 类 号：TV142[水利工程—水力学及河流动力学] O359[理学—流体力学]